Adaptec AHA-1540C/1542C SCSI Host Adapter
F1:
Fuse, 1.5a, 125v, Term. Power
Default settings are in
Bold
or are selected by a
.
SW: Options
SW(1): SCSI Termination
Open for Software Control.
Jumpered for Hardware Control (On).
SW(5): Floppy Support
(AHA-1542C only)
Open to Enable Floppy Support.
Jumpered to Disable Floppy Support.
I/O Address Select
I/O Port
SW2
SW3
SW4
330-333h
Off
Off
Off
334-337h
On
Off
Off
230-233h
Off
On
Off
234-237h
On
On
Off
130-133h
Off
Off
On
134-137h
On
Off
On
Reserved
Off
On
On
Disabled
On
On
On
(Default is 330-333h.)
BIOS Address
Address
SW6
SW7
SW8
DC000h
Off
Off
Off
D8000h
On
Off
Off
D4000h
Off
On
Off
D0000h
On
On
Off
CC000h
Off
Off
On
C8000h
On
Off
On
Reserved
Off
On
On
Disabled
On
On
On
(Default is DC000h.)
All other functions are now controlled through the BIOS Setup screen, which is accessible durring boot-up. (Of course, the BIOS must be enabled for this.) Drives up to 8.4GB are supported using the standard BIOS. For drives over 1GB, the new "Extended Translation" scheme is used, which increases the default head translation.
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